The key experiential question of Google Glass isn’t what it’s like to wear them, it’s what it’s like to be around someone else who’s wearing them. I’ll give an easy example. Your one-on-one conversation with someone wearing Google Glass is likely to be annoying, because you’ll suspect that you don’t have their undivided attention. And you can’t comfortably ask them to take the glasses off (especially when, inevitably, the device is integrated into prescription lenses). Finally – here’s where the problems really start – you don’t know if they’re taking a video of you.

Well—

It’s not a stretch to imagine that you could immediately be identified by that Google Glass user who gets on the bus and turns the camera toward you. Anything you say within earshot could be recorded, associated with the text, and tagged to your online identity. And stored in Google’s search index. Permanently.